if (document.images) 
{
  var defImg = "pack";

  var aktualnoscioff = new Image();
  aktualnoscioff.src = "./images/site/aktualnosci1.gif";
  var aktualnoscion = new Image();
  aktualnoscion.src = "./images/site/aktualnosci2.gif";
	
  var ofertaoff = new Image();
  ofertaoff.src = "./images/site/oferta1.gif";
  var ofertaon = new Image();
  ofertaon.src = "./images/site/oferta2.gif";
	
  var realizacjeoff = new Image();
  realizacjeoff.src = "./images/site/realizacje1.gif";
  var realizacjeon = new Image();
  realizacjeon.src = "./images/site/realizacje2.gif";
	
  var onasoff = new Image();
  onasoff.src = "./images/site/onas1.gif";
  var onason = new Image();
  onason.src = "./images/site/onas2.gif";
	
  var kontaktoff = new Image();
  kontaktoff.src = "./images/site/kontakt1.gif";
  var kontakton = new Image();
  kontakton.src = "./images/site/kontakt2.gif";
}

function actMenuItem(imgName) 
{
  if(document.images)
     document.images[imgName].src = eval(imgName + "on.src");
}

function inactMenuItem(imgName) 
{
  if(document.images)
     document.images[imgName].src = eval(imgName + "off.src");
}